Investigation on the Effects of Microvibration on the Atomic Comagnetometer
Chang Liu, Kai Wei, Zitong Xu, Yichao Tian, Chencheng Tang, Di Gong, Xinda Song, Yueyang Zhai
Abstract
Precision measurements utilizing atomic spins are widely used in fundamental physics research, inertial sensing, biomagnetism, and the generation of standard quantities. These precision measurements based on quantum sensors have long been disturbed by micro-vibration. In this work, we study the influence of micro-vibration on spin ensembles and perform the experiment on atomic comagnetometer for the first time, which is a powerful tool for search for dark matter and new force, as well as inertial navigation. The model of the effects of micro-vibration on the atomic comagnetometer is established, which considers the transfer characteristics of micro-vibration and the response characteristics of the atomic spin ensembles to the vibration. Moreover, we develop a vibration isolation system, which is a combination of air-floating passive vibration isolators and active feedback systems, to suppress the influence of micro-vibration. Based on the established model and the vibration isolator, we achieve an ultrahigh sensitive comagnetometer, which is among the most sensitive comagnetometer. This work is of wide interest in precision measurement based on quantum sensors and could pave the way for the design of combined vibration isolation systems for such experiments to further improve the sensitivity.